In Singapore, drivers generally obey the rules, but the attitude around pedestrians is actually quite different. It's culturally different. People drive safely, but it's not the same deference shown to pedestrians.

Cities like New Delhi for example, where traffic is dense and it's a more fluid driving environment, that's hard for self-driving technology to deal with.

There's a lot of knowledge in civil engineering about how soils will react when subjected to heavy loads. When you take lightweight vehicles and granular soils of varying composition, it's a very complex modeling process.